import sun.security.provider.SHA;

import java.math.BigDecimal;
import java.math.BigInteger;

public class Main816 {
    public static void main(String[] args) {
        String a = "12" + "34" + new String("12") + "1234";
        short s1 = 1;
        long s = 1L;
        int si = 2;
        // s1 = s1+1; 向下转型
        si = s1+si; // 向上自动转型
        s = s+si; // 向上自动转型
        Low low = new Low();
        Heigh heigh = new Heigh();
        // heigh = low; // 向下转型需强转
        low = heigh;
        double c = 1d - 0.9d;
        double b = 0.9d - 0.8d;
        System.out.println(c == b);
    }
}
